My Daughter 9yrs Old Has Been Having Episodes For About

my daughter 9yrs old has been having episodes for about three years now.In the colder months she gets a sore throat then a cough then a wheeze.EVERY two to three weeks. the doctors think its seasonal asthma . She seen an asthma consultant who did not give her a diffinate asthma diagnosis and on my request refered her to ent as her fathers family all had these symptoms untill their tonsils were removed. The ent guy looked at her throat said there was nothing wrong and discharged her.If it is asthma its not under control with all the inhailers and nebs and steriods,I dont hink it is asthma what can i do?